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Finding the Fourth Proportional to 69,806.85, 103,920.74 and 69,391.67

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Solution

The fourth proportional to 69,806.85, 103,920.74 and 69,391.67 is: 103,302.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,806.85 : 103,920.74 = 69,391.67 : x
  2. Step 2: Convert to fraction form
    69,806.85/103,920.74 = 69,391.67/x
  3. Step 3: Cross multiply
    69,806.85x = 103,920.74 × 69,391.67
  4. Step 4: Simplify right side
    69,806.85x = 7,211,233,089.89
  5. Step 5: Solve for x
    x = 7,211,233,089.89/69,806.85
  6. Step 6: Final answer
    x = 103,302.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.